Shoe upper



FIG. 1 is a front perspective view of a shoe upper showing my new design;

FIG. 2 is a rear perspective view thereof; and,

FIG. 3 is a side view thereof.

The broken lines immediately adjacent to the shaded area represent unclaimed boundaries of the design. The broken lines showing the four regions within the shaded area and the remainder of the shoe are for environmental purposes only and form no part of the claimed design. 

The ornamental design for a shoe upper, as shown and described. 